CSA Peer Group Reassignment

Peer groups are reassigned quarterly. A reassignment can move a carrier in or out of alert status — even with no behavioral change.

How peer groups are determined

• Number of power units
• Average inspection volume (3-year average)
• Time in operation
• Carrier type (general / hazmat / passenger)

Reassignment triggers

• Acquired carrier(s) increase power-unit count
• Reduced fleet size
• New entrant status concluded
• Changed authority (interstate to intrastate, etc.)
• Audit changing carrier type classification

Impact on percentile

• Moving from smaller peer group → larger one typically reduces percentile volatility
• Moving from larger → smaller can cause score swings
• New peer group may have different distribution = different alert risk

What to watch

• Quarterly reassignment notice from FMCSA
• Your peer group ID changes
• Your percentile vs your prior peer group

When reassignment helps

• Smaller carrier acquired by larger fleet — joins larger peer group with calmer scores
• Carrier reduces fleet but stays in same peer tier — score may improve relative to larger peers

When reassignment hurts

• Carrier grows out of "new entrant" peer group
• Carrier moves to higher inspection-volume tier
• Carrier becomes hazmat from general freight (suddenly subject to 60th threshold)

Compass monitoring

• Tracks your peer group changes quarterly
• Alerts when reassignment causes percentile to cross threshold
• Provides historical context

CFR citations

• FMCSA SMS Methodology
• 49 CFR § 385.4

How Compass surfaces this

Searchable in Compass Ask. Runs against the carrier's actual fleet data when invoked from the relevant tracker. Read-only; no actions without explicit user approval.

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